Festo CMMO-ST-C5-1-LKP, Оригинальное руководство пользователя

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C Festo Parameter Channel (FPC)
Festo – GDCP-CMMO-ST-LK-C-HP-EN – 2017-05b – English 155
C.4.3 Parameter file and user data package
Parameter file
The parameter file functions as a data container of the complete parameter set of a motor controller.
With it, parameter settings can be transmitted between identical motor controllers.
The parameter file consists of the three parts header, data range and CRC test value.
File beginning
256 bytes Header
n bytes Data range (objects)
2 bytes CRC test value
File end
Fig. C.2 Structure of parameter file
With an upload of the parameter file, the parameter values are transmitted from the permanent data
memory of the motor controller.
If the parameters of the motor controller were changed during execution time, although they are active
they are not stored in the permanent memory of the motor controller and so are lost after a restart.
With PNU 127:2, the current parameterisation can be stored in the permanent data memory.
User data package
The parameter file is divided into 6-byte blocks for transmission and, put back together after transmis­
sion.
The LSB (lowest-order bit) of the user data is in byte 3 (Little Endian), that is, directly after the protocol
header of the 8-byte EFPC. If no user data are present, all bits equal zero.
If all 6 bytes from the last transmitted data telegram are no longer needed, the remaining bytes are
filled with zeros. The parameter file size, which was transmitted at the start, determines up to where
the data have to be evaluated.